611176
ABDAF A(a)AAA A(c)(b)CC AC(a)BA BBADC (a)ABBC A(b)AAB B(a)ADB
CDABC CBABC AADDA
CACCA DBAAB AAABD
DCAAA BCCCB ABACD
DBDAD CCDAA AABAB
DADDB CDDDD DADDC DCDCC